Iron-base alloys



United States Patent Ofiice 3,012,881 Patented Dec. 12, 1961 3,012,881 IRON-BASE ALLGYS Arthur T. Cape, Monterey, Calif., assiguor to Coast Metals, Inc., Little Ferry, N.J., a corporation of Delaware N Drawing. Filed Oct. 17, 1960, Ser. No. 62,878 2 Claims. (Cl. 75-128) This invention relates generally to iron-base alloys which have exceptional hardness and Wear resistance.

A primary object of the invention is to provide an alloy of this character which can be sprayed or applied to a metal base by means of a torch, such as that described in my copending application, Serial No. 47,053, and which, after being sprayed, can be melted at a relatively low temperature, so as to form a hard, wear resisting part or surface on the metal base.

Another object of the invention is to provide an alloy of this character, which can be formed into a ring, such as a sealing ring, by spraying the alloy onto a part to which the alloy will not adhere or stick, and then melting the sprayed alloy while on said part, and thereafter removing the ring which is formed.

A further object of the invention is to provide an alloy of this character which can also be cast in the form of a ring or the like.

In accordance with the invention, the alloy contains the following constituents:

The alloy melts at a temperature of about 2050 F., and has great hardness, in the as-melted or as-welded state, the hardness being from about to about 68 Rockwell C. If the temperature of melting is properly controlled, the alloy has a Knoop hardness of the order of 1100.

The properties of the alloy, particularly the sprayability and remelting characteristics thereof, may be improved by the incorporation in the alloy of cobalt, in the range of from about 10 to about 22% cobalt, with about 15% cobalt preferred. The cobalt, when used, will replace part of the iron.

It will be understood that slight changes may be made in the alloy, without departing from the spirit of the invention, or the scope of the appended claims.

Having thus described my invention, I claim:

1. An iron base alloy consisting of from 1.5 to 2% carbon, 3 to 6% chromium, 1.75 to 2.25% nickel, 1.75 to 2.25 copper, 1.75 to 2.25 manganese, .75 to 2.5% silicon, 1.75 to 3% molybdenum, 3 to 3.5% boron, and the balance substantially all iron.

2. An alloy, as defined in claim 1, in which the iron is replaced in part by cobalt, in an amount of from about 10% to about 22% cobalt.

References Cited in the file of this patent UNITED STATES PATENTS 1,988,910 Merica et a1 Jan. 22, 1935 2,053,346 Merten Sept. 8, 1936 2,175,683 Charlton Oct. 10, 1939 

1. AN IRON BASE ALLOY CONSISTING OF FROM 1.5 TO 2% CARBON, 3 TO 6% CHROMIUM, 1.75 TO 2.25% NICKEL, 1.75 TO 2.25% COPPER, 1.75 TO 2.25% MANGANESE, .75 TO 2.5% SILICON, 1.75 TO 3% MOLYBDENUM, 3 TO 3.5% BORON, AND THE BALANCE SUBSTANTIALLY ALL IRON. 